Question

大家好我从二进制文件读取二进制数据时遇到问题如下：

文件内容： D3 EE EE 00 00 01 D7 C4 D9 40

char * afpContentBlock = new char[10];
ifstream inputStream(sInputFile, ios::in|ios::binary);

if (inputStream.is_open()))
{
    inputStream.read(afpContentBlock, 10);

    int n = sizeof(afpContentBlock)/sizeof(afpContentBlock[0]); // Print 4

    // Here i would like to check every byte, but no matter how i convert the 
    // char[] afpContentBlock, it always cut at first byte 0x00.
}

我知道这发生在字节0x00的原因。有办法以某种方式管理它吗？我试图用ofstream对象编写它，它工作正常，因为它写出了整个10个字节。无论如何，我想遍历整个字节数组来检查字节值。

非常感谢。

Answer 1

从ifstream中读取多少字节要容易得多：

if (inputStream.is_open()))
{
   inputStream.read(afpContentBlock, 10);
   int bytesRead = (int)inputStream.gcount();

   for( int i = 0; i < bytesRead; i++ )
   {
      // check each byte however you want
      // access with afpContentBlock[i]
   }
}

ifstream读取二进制数据发出0x00字节

1 个答案: